Washout plug



H. HOWARD.

WASHOUT ILUG.

APPLlcATmN mw ma. 5. :921.

Patented Mar. 7, 1922.

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ASSIGVNH T0 HARRY NEWTON REYNOLDS,

on Webmuur-man, entrante, manana, aan) ranvrnnni o. MARTIN, or JACKSON,

'WSEOUT Patented Man 7, 1922.

applicativa meeuwen 5, wel. sensi no. liasse.

To alleato/nt 'may emmer/nf Be it-,ltnov'vn that li, HAL l-loiveao, a citizen ot' the `United States, residing1 at Llachn son, inthe eountyvoiz `lldadison and State ot Tennessee, haveinvented eertainnew and useiul 'improvements in Washout lugs, of which the following is a specification.

This' invention relates to' improvements in washout plugs and is adaptable for use in connection with locomotive boilers, tanks, drums, barrels, and other containers for oil, gasolene, or explosive fluids.' The ordinary washout plug is removably" threaded directly into the opening in theboiler shell, or

the wall of the tank or other container in connection with which it is used,=and the plugs require to be removed and replaced at more lor less frequent intervals in order that the boiler, tank, or the like, may be llushed'or otherwise Cleaned to remove sediment or other accumulations, `Such a pluo', and the Wall `of the opening provided for its recep tion,are ordinarily Vformed with relatively finethreads and because of Corrosion of the threads .or an improper fitting ot the plugr into the opening at the time it replaced after removal, the threads are liable to bel come distorted, stripped, or otherwise damagedv'ith the result that leakage occurs or the plug is liable to be blown out it subjected to pressure, for example where employed in connection with a locomotive boiler, rihe blowing; out of such a plug or even the leakage referred to is liable to produce serious results and especially by endangering the livesexF worlmien employed in the vicinity of the locomotive or tank or the like in connection with which the plug is employed. .lt is therefore one ot the primary objects ot the present invention to provide a plug so constructed that all ot' the foregoing dis advantages will be overcome, the plus' being; so constructed and fitted that it may be readily and conveniently' removed and relaced without any likelihood of injury to its threads and in less time than required for t ie removal ol the ordinary plug and being;l furthermore so constructed as to pro vide against leakage. l

Another object of the invention is to form the plugn and the bore of the bushing in which it is received with threads of a steeper inclination than the threads by which. the bushing is tted into the opening in the boiler shell, so that when the plug is rotatedit will be quickly Withdravifn fromy or dravvn into the bushing thereby providing for its more rapid removal yand replacement than iii' its threads were ot' the same inclination as the threads 'establishing connection between the bushing and the boiler shell. Another object of the invention is to provide a plug oi the class described so constructed and iitted that it vvillbe more substantial than the ordinary plug and will have its threads protected from eorrosio'n furtherobject or the invention is to so construct the plug and .its seat as toprovide a seal" in addition to .that aforded by thel l f matching 'threads of the plug "and seat.

n the accompanying drawings:

Figure l. is a diametrie sectional view through one term ot the plug and its seat;

Figure 2 is a side elevation of the plug removed; l' l Figure is a similar viertT illustrating a slightly modified form of plug; I Figure Il is a vieu' similar to Figure l illustratiingr a further moditication or the invention.

ln the drawings, the numeral l indicates one Wall ot a locomotive boiler shell or a Wall of a tank or other container, and the numeral 2 indicates an opening which -is formed in this wall and the wall of which opening` is threaded. The seat for the plug` is in the nature of a bushing which is indicated in general by the numeral 3 and which comprises a hollow cylindrical body 4; exteriorly threaded, as indicated by the numeral 5., so as to it Within the opening 2, the threads 5 and the threads of' the opening 2 being relatively line and gradually pitched. At its `outer end the body is formed exteriorly with a ioirrumseribing collar 6, which may be of any sha-pe desired such as oetagonal, hexagonal or circular, havimgT ay relatively llat bearing face i' which, when the bushing is threaded into place, bears snugly against the outer faee of the Wall l. lt desired, as illustrated in Figure l of the drawings, the collar 6 may be welded, as at 8, to the said Wall l so as to permanently secure the bushing' in place Within the openingr 2 in the said wall, although it is not absolutely essential that this be done, as the bushing' may be of tapered torni and screwed into the shelloi the boiler tank or container. lnteriorly, the body 4l ot the bushing 'formed with threads 9 which are preferably considerably larger than the threads which unite the bushing and Wall 1 and which are rectangular in cross section. The threads 9 are likewise preferably more sharply pitched than the threads 5 and extend troni the inner end ot' the bushing body to a shoulder 10 which is formedinteribrly of the bodyil and -eX- tends circumferentially of the wall thereof and is spaced inwardly from the outer end ot thecollar 6, this shoulder being formed by interiorly enlarging the bore of the body 4 at its outer end,las indica-ted by the numeral 11.

The-plug is indicated in general by the numeral 12 and the Same comprises a cylindrical body formed throughout the major portion of its length from one end with threads 13 shaped and pitched to conform to the threads 9 and adapted to coact therewith when the plug is threaded into the bushing. The body 12 is formed at its outer end with a oircuniscrihing shoulder 14: having a seating face l5 which is to oppose the face ofV the shoulder 10 when the plug is fitted into place, the enlargen'ient 14 of the plug body lieing received within the enlargement 11 of theihushing, as best illustrated in Figures 1 and 4 of the drawings. lf desired, as illus trated in Figure 1, a packing Washer 16 comprising soft metal rings 17 and an asbestos or other suitable intermediate compressible Yring '18, is disposed within the enlarged end 11 of the bore of the bushing and is to be compressed between the faces of the shoulders 10 and 14; when the plug is threaded into place,` and tightened. It this washer is 4not employed, the said faces of the said shoulders Will .mutually contact as illustrated in Figure 4: of the drawings.

polygonal head 19. It desired liowever,this

end of the plug may be formed with a polygonal socket 20 as in Figure 4, when it is desired or required to employ a different type ot' wrench because oiu a relatively inaccessible location of the plug. lt is stated above that the threads 9 and 13 are rectangular in cross section but ifI desired the edges of these threads might be rounded to a greater or less extent, as indicated by the numeral 21 and as clearly shown in Figure 3 of the drawings.

Having thus described the invention, what is claimed as new is A washout plug comprising a bushing exteriorly threaded whereby to adapt it to be lfitted into a wall and formed interiorly with relatively coarse threads of a different inclination Jfrom those upon the exterior of the bushing, the bushing being provided exteriorly at one end with a circurnscribing outstanding Aflange formed with a collar upon its outer face Surrounding the said end of* the wall of thebushing and providing a relatively deep recess, and a plug removahly fitted into the bushing and having relatively coarse threads itting the threads of the bushing, eircurnscribing shoulder fitting relatively snugly Within the said recess and having a flat seating face for coactioii with the end tace of the wall of the bushing.

. In testimony whereof I ailix my signature. 7

HAL HowAit-n. [n 5.]

the plug being provided with a 

